[Williams]

If so, it's hard to understand why anyone does this. It's not hard to paraphrase ideas that are circulating elsewhere.

[Tanniker Smith]

Or just to credit the original writer.

[summer]

In the same vein, I don't understand why teachers constantly present their own biased points of view to a class, when it's so easy to instead say:

"Some people think THIS; some people think THAT -- now, students, what do YOU think and why?"